June 30th, 2007

The formation of Diamond Deposits

Science News has a nice article on how diamonds are formed and surface. A Gemstone’s Wild Ride:

Almost all diamonds come from volcanic deposits called kimberlites. Tens of thousands of such deposits, some more than a kilometer across, have been found protruding through Earth’s surface. However, only one in every 200 of them contains gem-quality diamonds. Increasingly, scientists are looking at kimberlites’ odd mix of geological characteristics to discern how diamond deposits get there in the first place.

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